WO2019212080A1 - Isolation souple à base d'aérogel et procédé pour sa fabrication - Google Patents

Isolation souple à base d'aérogel et procédé pour sa fabrication Download PDF

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WO2019212080A1
WO2019212080A1 PCT/KR2018/005168 KR2018005168W WO2019212080A1 WO 2019212080 A1 WO2019212080 A1 WO 2019212080A1 KR 2018005168 W KR2018005168 W KR 2018005168W WO 2019212080 A1 WO2019212080 A1 WO 2019212080A1
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expanded graphite
airgel
aerogel
based flexible
flexible insulation
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PCT/KR2018/005168
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English (en)
Korean (ko)
Inventor
천자우
문승환
박형호
이규연
Original Assignee
주식회사 에슬린
연세대학교 산학협력단
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Publication of WO2019212080A1 publication Critical patent/WO2019212080A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
    • C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
    • C08J3/075—Macromolecular gels
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/02—Ingredients treated with inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances

Definitions

  • the present invention relates to an airgel-based flexible insulation and a manufacturing method, and more particularly, including expanded graphite in which the interlayer spacing is adjusted and the airgel is inserted into the interlayer, thereby preventing the inserted airgel from escaping from the insulation.
  • the present invention relates to an airgel-based flexible heat insulating material and a method of manufacturing the heat insulating property.
  • Aerogel is a material consisting of more than 90% of the inside of the air, the drying process and the solvent inside the material by the capillary force is produced only by the capillary force without deformation of the structure due to the force of the interface between the gas and liquid. Therefore, unlike the material that has undergone a general drying process, it is a material having many pores while maintaining its own structure.
  • aerogels Due to these characteristics, aerogels have attracted attention as ultra-light porous materials with specific surface areas of several hundred m 2 / g or more, 90% or higher porosity and low density (0.003-0.1 g / cm 3 ), and very low thermal conductivity (0.013- 0.04 W / m ⁇ K), it is used as a material having excellent heat insulation.
  • aerogels are structurally very weak and difficult to insert into existing insulation.
  • Conventional aerogel insertion methods include a method of impregnating a sol airgel into a reticulated and fibrous material (Sol-Gel process) and drying, and impregnating and drying a reticulated and fibrous material by mixing a powdered airgel with a solvent. And a method of coating and drying a liquid airgel on an existing heat insulating material surface.
  • Korean Patent No. 10-1436371 relates to a method for manufacturing an aerogel composite material using an interface. After forming a hydrophobic airgel phase separated from a hydrophilic aqueous solution, the mixture is stirred at an appropriate temperature and speed to allow pores inside the aerogel to form a resin.
  • the present invention provides an airgel composite material and a method of manufacturing a method of preventing impregnation and minimizing material content other than airgel to maintain high porosity and low thermal conductivity. Accordingly, the pores of the airgel incorporated into the airgel composite material, which may occur when the airgel composite material is produced by conventional melt compounding, in which the particles to be mixed are heated after the melting temperature of the resin is injected and molded. The impregnated with the resin prevents the porosity from being lowered to obtain an airgel composite material having a low thermal conductivity.
  • Korean Patent No. 10-1674789 relates to an airgel-complexed melamine foam having excellent thermal conductivity and stability, and to a method for manufacturing the same.
  • the present invention provides an foam having improved heat resistance, and has an effect of providing an airgel-complexed melamine foam and a method of manufacturing the same, which can minimize the loss of the airgel from the airgel-complexed melamine foam.
  • One embodiment of the present invention is to provide an airgel-based flexible insulation to prevent the loss and separation of the airgel, including expanded graphite that is inserted into the airgel inside the interlayer is adjusted by the interlayer spacing.
  • One embodiment of the present invention is to provide an airgel-based flexible insulation having a low thermal conductivity by increasing the amount of airgel inserted into the expanded graphite.
  • One embodiment of the present invention is to provide an airgel-based flexible insulation that is well mixed with various liquid and solid insulation through the expanded graphite in which the airgel is sufficiently inserted.
  • One embodiment of the present invention is to provide an aerogel-based flexible insulation to double the incombustibility and flame retardancy of the insulation, including expanded graphite as a flame retardant.
  • One embodiment of the present invention is to provide an airgel-based flexible heat insulating material improved in flexibility and workability of the heat insulating material, including expanded graphite and cured resin.
  • the airgel-based flexible insulation includes an expanded graphite in which the interlayer spacing is adjusted through at least one of an airgel, physical and chemical methods, and the airgel is inserted into the interlayer, and the cured resin mixed with the expanded graphite. can do.
  • the expanded graphite may include 50 to 150 parts by weight based on 100 parts by weight of the cured resin.
  • the expanded graphite may further include an expanded hollow body that is physically stirred.
  • the expanded graphite is cooled to minus 110 ° C. or less to enlarge the interlayer spacing, and the interlayer spacing may be reduced by increasing the temperature to 5 ° C. or more after insertion and insertion of the airgel.
  • the airgel may be inserted into the content of the interlayer of the expanded graphite using the polarity due to the charging effect.
  • the expanded graphite is a reticulated organic / inorganic solid (Polyisocyanurate, Polyurethane, Styrofoam, Mineral wool, Melamine Foam, Glass Wool, E-Glass, etc.), reticulated organic / inorganic fiber, liquid rubber, plastic, paint, organic / inorganic powder, organic It may be used in admixture with a heat insulating material comprising at least one of inorganic foam (Foam) and hollow spheres (Hollow Sphere).
  • a heat insulating material comprising at least one of inorganic foam (Foam) and hollow spheres (Hollow Sphere).
  • a method for producing an airgel-based flexible insulation includes (a) heating the expanded graphite to a specific temperature; (b) surface modifying the heated expanded graphite to form functional groups on the surface of the heated expanded graphite; (c) penetrating the hydrolyzed sol inside the surface modified expanded graphite to form an aerogel; And (d) stirring the expanded graphite having the airgel inserted therein with the cured resin.
  • the step (b) may include the step of surface modification of the expanded graphite by oxidizing the expanded graphite with Mn 2 O 7 oxidant produced by a mixture of potassium permanganate and sulfuric acid.
  • the step (c) may include forming the inside of the expanded graphite by doping the airgel NH 3 .
  • the disclosed technique can have the following effects. However, since a specific embodiment does not mean to include all of the following effects or only the following effects, it should not be understood that the scope of the disclosed technology is limited by this.
  • the airgel-based flexible insulation material according to an embodiment of the present invention can be prevented from the loss and departure of the airgel, including expanded graphite is inserted into the airgel is inserted into the interlayer space is adjusted between the layers.
  • the airgel-based flexible insulation material according to an embodiment of the present invention may have a low thermal conductivity by increasing the amount of airgel inserted into the expanded graphite.
  • the airgel-based flexible insulation material according to an embodiment of the present invention can be mixed well with various liquid and solid insulation materials through expanded graphite in which the airgel is sufficiently inserted.
  • Aerogel-based flexible insulation can include the expanded graphite which is a flame retardant can double the incombustibility and flame retardancy of the insulation.
  • Aerogel-based flexible heat insulating material can be improved flexibility and workability of the heat insulating material, including expanded graphite and cured resin.
  • FIG 1 is an actual picture of the airgel-based flexible insulation 100 according to an embodiment of the present invention.
  • FIG 2 is a view showing a process in which the expanded graphite 300 and the airgel 200 is inserted into the interlayer space between the interlayer spacing according to an embodiment of the present invention.
  • FIG 3 is a view showing a manufacturing method of the airgel-based flexible insulation 100 according to an embodiment of the present invention.
  • FIG. 4 is a graph showing a change in expansion rate with respect to a change in temperature according to an embodiment of the present invention.
  • FIG. 5 illustrates an airgel 200 inserted between layers of expanded graphite 300 and expanded graphite 300 in which an interlayer spacing is adjusted in an airgel-based flexible insulating material 100 according to an embodiment of the present invention.
  • first and second are intended to distinguish one component from another component, and the scope of rights should not be limited by these terms.
  • first component may be named a second component, and similarly, the second component may also be named a first component.
  • an identification code (e.g., a, b, c, etc.) is used for convenience of description, and the identification code does not describe the order of the steps, and each step clearly indicates a specific order in context. Unless stated otherwise, they may occur out of the order noted. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.
  • the "curable resin” has a property (plasticity) that can be freely deformed by heating when heat-molding with a thermosetting resin, but when the reaction proceeds again, it is cured in an insoluble state and does not cause plasticity even when heated.
  • Plasticity plasticity
  • Says Susie. refers to a synthetic resin that is not dissolved again by heating or solvent after it is molded into a certain form by applying heat and pressure and cooled and solidified.
  • “Flexible Insulation” is a heat insulator in solid or semi-solid (GEL) state. It has a bonding property between insulation materials, and has high flexibility such as clay, making it easy to install and install on the surface of an object requiring complex shape insulation (not dried at room temperature). Semi-solid).
  • FIG 1 is an actual picture of the airgel-based flexible insulation 100 according to an embodiment of the present invention.
  • the airgel-based flexible insulating material 100 is an airgel 200, the expanded graphite 300 and the expanded graphite 300 is controlled by the interlayer spacing through at least one of physical and chemical methods and the airgel is inserted into the interlayer; It may include a mixed cured resin (400).
  • the airgel 200 may be used by inserting it into an existing heat insulating material with a low thermal conductivity and a lightweight material.
  • airgel has a problem that it is difficult to be stirred or inserted into a liquid cured resin or a solid of a network structure.
  • a dust problem occurs, and after the construction, the airgel escapes to the outside during the use of the insulation, and the insulation performance may be drastically degraded.
  • the airgel-based flexible insulating material 100 of the present invention includes expanded graphite 300 having good compatibility with various kinds of liquid and solid insulating materials.
  • Expanded graphite 300 is a graphite that can be expanded in volume by inserting an interlayer compound that reacts with heat between layers of graphite, which is a kind of carbon crystal made of flat hexagonal structures. Between the layers of graphite are bonded with weak van der Waals forces, and interlayer compounds, such as sulfur or nitrogen compounds, which can react with heat can be inserted between the layers of graphite. Applying heat after insertion can explode the explosive separation of layers from layer to layer due to the combustion and gasification of the interlayer compounds.
  • Expanded graphite 300 may be used as a flame retardant.
  • the expanded graphite 300 is expanded by graphite to generate an expansion layer on the surface of the material, the expansion layer can protect the core material to prevent the spread of fire and minimize toxic gases and smoke.
  • the expanded graphite 300 may be used as an adsorbent due to the porous structure in addition to the flame retardant and the heat insulating material.
  • the expanded graphite 300 has a high mechanical strength and a high combustion point to withstand extreme processes such as supercritical drying, thereby performing a silica airgel process together.
  • the expanded graphite 300 may be controlled between layers by physical or chemical methods or physical and chemical methods. Physical and chemical methods can include temperature control, chemical surface modification, spacer insertion, and the like.
  • FIG 2 is a view showing a process in which the expanded graphite 300 and the airgel 200 is inserted into the interlayer space between the interlayer spacing according to an embodiment of the present invention.
  • the expanded graphite 300 may be expanded through physical or chemical methods to increase the interlayer spacing.
  • An airgel may be inserted into the expanded graphite 300 having an enlarged interlayer distance.
  • the expanded graphite 300 in which the airgel is inserted can be reduced in interlayer spacing through physical or chemical methods. Through this process, the airgel 200 may be blocked inside the expanded graphite 300 to prevent a problem of being lost or released during use of the heat insulating material, and the heat insulating performance may be maintained.
  • the airgel-based flexible insulation 100 may be inserted and inserted into the airgel 200 as desired within the expanded graphite 300 is controlled interlayer spacing.
  • the expanded graphite 300 into which the airgel 200 is inserted may be mixed with the existing heat insulating material to improve agitation. Therefore, the expanded graphite 300 may compensate for problems in which dust is generated when the airgel 200 is inserted into the insulating material, or the performance of the insulating material is sharply reduced due to airgel detachment occurring after or during the construction of the insulating material.
  • Curing resin 400 may be used as an industrial insulation in the form of a foam.
  • Industrial insulation can be generally divided into organic and inorganic, the organic material may be used cork, cotton, felt, cork carbide, foam rubber and the like.
  • Minerals include glass fiber, mineral wool, glass wool, E-glass, asbestos, glass wool, quartz wool, diatomaceous earth, magnesium carbonate powder, magnesia powder, calcium silicate and pearlite.
  • These industrial insulation materials are manufactured in the form of solid forms, and are manufactured in various forms such as fibers, pipes, and plates according to the use and environment, and applied to each site.
  • Curing resin 400 is a material that can be used at high temperatures and to form a structure of a heat insulating material improved.
  • the cured resin 400 may be manufactured based on silicone oil, and may have a porous structure including an expandable hollow sphere as a blowing agent.
  • the cured resin 400 may include a porous structure to improve heat insulation.
  • Curing resin 400 may have a Mooney viscosity ML (1 + 4) of 5 ⁇ 20 MU at 23 degrees Celsius.
  • the hardening resin 400 may have flexibility by controlling the degree of hardening and having a semi-solid shape.
  • the hardening resin 400 may be installed in a device having an elaborate shape, such as a complex pipe or a valve handle, and may provide a space between an insulating material and an insulating material. This can minimize heat losses.
  • FIG 3 is a view showing a manufacturing method of the airgel-based flexible insulation 100 according to an embodiment of the present invention.
  • Airgel-based flexible insulation 100 manufacturing method is a step of expanding the expanded graphite 300 by heating the expanded graphite (300) to a specific temperature, the expanded graphite (300) heated to form a functional group on the surface of the expanded graphite (300) Surface modified), penetrating the hydrolyzed sol into the surface-modified expanded graphite 300 to form an airgel 200, and doping NH 3 to the formed airgel 200 by expanding the expanded graphite 300 It may include the step of shrinking and curing by expanding the expanded graphite (300) in which the aerogel 200 is inserted with the curable resin (400).
  • the method of manufacturing the airgel-based flexible insulation 100 may include expanding the expanded graphite 300 by heating the expanded graphite 300 at a specific temperature (step S1).
  • expanded graphite 300 may be heated at 300 to 500 degrees Celsius.
  • the heating method may be a method such as direct heating, hot air heating and microwave.
  • the expanded graphite 300 after heating may be spaced apart from each other to form a space, unlike before heating.
  • the interlayer spacing of the expanded graphite 300 may be expanded from 3.4 ⁇ to 10.2 to 21.8 ⁇ .
  • FIG 4 is a graph showing a change in expansion rate with respect to a change in temperature according to an embodiment of the present invention. As the heating temperature is higher, the expansion rate may increase, and above a certain temperature, the expansion rate may be kept constant.
  • the expanded graphite 300 may adjust the interlayer spacing by physical or chemical methods.
  • the expanded graphite 300 may be cooled according to a solvent to enlarge the interlayer spacing.
  • the expanded graphite 300 may be cooled to minus 110 ° C. or less to enlarge the interlayer spacing and increase the temperature to room temperature after insertion and insertion of the airgel 200 to reduce the interlayer spacing.
  • the expanded graphite 300 may further include an expanded hollow body that is physically stirred to increase the interlayer spacing.
  • the expanded hollow body may be disposed between the expanded graphite 300 layers to serve as spacers to widen the interlayer spacing of the expanded graphite 300.
  • the expanded hollow body may be extracted by physical and chemical methods to reduce the gap between the expanded graphite 300 layers.
  • the expanded graphite 300 may include 50 to 150 parts by weight based on 100 parts by weight of the cured resin 400. Expanded graphite (300) can compensate for the addition amount limitation, dust generation and airgel outflow of the airgel 200, which is a problem of the prior art that can occur when inserting the airgel into the existing insulation.
  • the method for manufacturing the airgel-based flexible insulation 100 may include surface modifying the heated expanded graphite 300 to form a functional group on the surface of the expanded graphite 300 (step S2).
  • the expanded graphite 300 may form a functional group through surface modification.
  • Surface modification of expanded graphite (300) is based on the Hummers method, Mn 2 O 7 produced by a mixture of potassium permanganate and sulfuric acid It may be oxidized by an oxidizing agent to form a bonding functional group such as -COOH or -OH on the surface.
  • a functional group may cause a polymerization reaction with the hydrolyzed airgel, and may chemically bond between the expanded graphite 300 and the airgel 200.
  • Airgel-based flexible insulation 100 manufacturing method may penetrate the hydrolyzed sol inside the surface-modified expanded graphite 300 to form the airgel 200 (step S3).
  • the expanded graphite 300 has an increased layer spacing, so that the hydrolyzed sol may be sufficiently penetrated inside the expanded graphite 300.
  • the surface-modified expanded graphite 300 may penetrate the silica sol into the expanded graphite 300 to induce chemical bonding.
  • the airgel-based flexible insulation 100 is chemically combined with the airgel 200 inside the expanded graphite 300 having increased interlayer spacing to prevent the airgel 200 from being separated, and has good mixing properties with various liquid and solid materials.
  • the expanded graphite 300 may be used to improve the agitation of the airgel 200 into the existing heat insulating material and the curing resin 400.
  • Aerogel 200 is supercritical of expanded graphite 300 and silica gel. It can be formed by drying on subcritical and atmospheric pressures.
  • the airgel 200 may be formed in a ratio of expanded graphite 300 and 9: 1.
  • the airgel-based flexible insulation 100 may have a low thermal conductivity by increasing the amount of airgel 200 inserted into the expanded graphite 300.
  • Aerogel-based flexible insulation 100 may be manufactured by a physical method.
  • the airgel-based flexible insulation 100 may be manufactured using airgel powder.
  • the airgel powder and the expanded graphite are mixed and heated in the stirrer, the airgel powder may be inserted into the expanded space of the expanded graphite.
  • the airgel-based flexible insulation 100 may be manufactured by stirring the expanding graphite in a closed space at high speed and spraying a small diameter of the airgel powder at high pressure.
  • the airgel powder may be inserted into the expanded graphite 300 by using the polarity due to the charging effect.
  • the airgel has a weak strength in structure and high insulation, and thus has a large charging effect due to static electricity, and thus, the airgel charged in this manner may have mobility in an electric field.
  • the method for manufacturing the airgel-based flexible insulation 100 may include a step of NH 3 doped into the formed airgel 200 to contract the expanded graphite 300 (step S5).
  • the expanded graphite 300 having the airgel 200 formed therein may be NH 3 doped.
  • the gap between the expanded graphite 300 formed in step S1 may be reduced by electrostatic attraction due to NH 3 doping.
  • the interlayer spacing of the expanded graphite 300 may be shrunk to 2.1 to 3.5 mm 3.
  • the airgel 200 chemically bonded to the inside of the expanded graphite 300 may be present in a form blocked by NH 3 doping to prevent loss or departure of the airgel 200. This process can induce a chemical bond of the airgel 200 inside the expanded graphite (300).
  • the expanded graphite 300 may be cooled to shrink the gap between the expanded layers.
  • the airgel-based flexible insulation material 100 may prevent the loss or departure of the airgel 200 inserted into the expanded graphite 300 by controlling the layer spacing of the expanded graphite 300 by physical and chemical methods. 200) can be inserted as needed to ensure low thermal conductivity.
  • Airgel-based flexible insulation 100 manufacturing method may include a step of curing by stirring the expanded graphite 300, the airgel 200 is inserted with the curing resin 400 (step S5).
  • the expanded graphite 300 into which the airgel 200 prepared in step S4 is inserted (injected) may be stirred with the curable resin 400 to be cured platinum or palladium-based catalyst.
  • Aerogel-based flexible insulation 100 may be used as a heat insulating material with improved flexibility in the form of a semi-solid.
  • the expanded graphite 300 may include 50 to 150 parts by weight based on 100 parts by weight of the cured resin 400.
  • the cured resin 400 may be composed of a polymer network consisting of an organosiloxane, including a porous structure can be increased thermal insulation performance.
  • the curable resin 400 may further include an expansion hollow body having a foaming agent and a thermal insulation function.
  • the expanded hollow body is thermoplastic particles and can be expanded when the polymer shell is heated in a form surrounding the gas.
  • the expanded hollow body may include 50 to 200 parts by weight based on 100 parts by weight of the cured resin 400. It is mixed with the curing resin 400 can reduce the density of the heat insulating material and can improve the heat insulating properties.
  • the airgel-based flexible insulation material 100 may have thermal stability of ⁇ 60 to 400 ° C., including the expanded graphite 300 in which the airgel 200 is inserted (injected) into the cured resin 400, and the airgel 200. And according to the insertion amount of the expanded graphite 300 may have a thermal conductivity of 0.02 or more and 0.035 W / mK or less.
  • the expanded graphite 300 may be mixed well with various kinds of liquid and solid phases. Therefore, the expanded graphite 300 in which the airgel 200 is sufficiently inserted can be used by mixing with various heat insulating materials.
  • Insulating materials that can be mixed include reticulated organic / inorganic solids (Polyisocyanurate, Polyurethane, Styrofoam, Mineral wool, Melamine Foam, Glass Wool, E-Glass, etc.), reticulated organic / inorganic fibers, liquid rubber, plastics, paint, organic / inorganic Inorganic powders, organic / inorganic foams (Foam), hollow spheres (Hollow Sphere) and the like.
  • reticulated organic / inorganic solids Polyisocyanurate, Polyurethane, Styrofoam, Mineral wool, Melamine Foam, Glass Wool, E-Glass, etc.
  • reticulated organic / inorganic fibers liquid rubber, plastics, paint, organic / inorganic Inorgan
  • Figure 4 is for checking the airgel 200 is inserted between the layers of the expanded graphite 300 and the expanded graphite 300 in the air gap-based flexible insulation 100 according to an embodiment of the present invention is controlled interlayer spacing.
  • FIG. 4A is a photograph showing expanded graphite 300 before heating. Expanded graphite (300) before heating can be confirmed that almost no layer is formed even when the cross section is generally flat.
  • Figure 4 (b) is a photograph showing the expanded graphite 300 after heating 300 degrees Celsius.
  • the expanded graphite 300 after the heating can be seen that the space is formed by a wide spaced apart layer than before heating.
  • Figure 4 (c) is a photograph showing the expanded graphite 300 is inserted (inserted) airgel 200.
  • the aerogels 200 inserted between the expanded graphite 300 layer intervals can be confirmed.
  • the airgel-based flexible insulation 100 of the present invention may be manufactured using expanded graphite 300 in which the volume is expanded when heat is applied thereto.
  • the interlayer distance of graphite may vary according to the degree of expansion of the expanded graphite 300, and when the interlayer distance is increased, a large amount of airgel 200 may be inserted into the interlayer space. By reducing the enlarged interlayer distance again, the airgel 200 may be blocked from being lost or separated. Therefore, by using the expanded graphite 300 that can adjust the interlayer spacing to improve the insertion amount and agitation of the airgel 200 can provide a heat insulating material thinner than the conventional high-flexibility, light weight having a low thermal conductivity. .
  • Example 1 Example 2
  • Example 3 Comparative example Density (g / cm 3 ) 0.008 0.007 0.005
  • Thermal Conductivity (W / mK) 0.030 0.027 0.025 0.038 Content of Expanded Graphite Inserted with Airgel (wt%) 60 65 75 40
  • the content of the expanded graphite in which the airgel is inserted in the silicone resin was prepared to include 60wt%.
  • Physical property results of the prepared airgel-based flexible insulation is shown in Table 1.
  • An airgel-based flexible insulation was prepared in the same manner as in Example 1, but the content of the expanded graphite in which the airgel was inserted in the silicone resin was 65 wt%. Physical property results of the prepared airgel-based flexible insulation is shown in Table 1.
  • An airgel-based flexible insulation was prepared in the same manner as in Example 1, but the content of the expanded graphite in which the airgel was inserted in the silicone resin was prepared including 75 wt%. Physical property results of the prepared airgel-based flexible insulation is shown in Table 1.
  • An airgel-based flexible insulation was prepared in the same manner as in Example 1, but the content of the expanded graphite in which the airgel was inserted in the silicone resin was prepared including 40 wt%. Physical property results of the prepared airgel-based flexible insulation is shown in Table 1.
  • the airgel-based flexible insulation 100 of the present invention has a thermal conductivity of 0.020 ⁇ 0.030 30 / m ⁇ ⁇ it can be seen that it can be applied as an industrial insulation.

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Abstract

La présente invention concerne une isolation souple à base d'aérogel et, plus particulièrement, une isolation souple à base d'aérogel et un procédé pour sa fabrication, l'isolant souple à base d'aérogel comprenant : un aérogel ; du graphite expansé présentant un espacement intercouche régulé par au moins l'un parmi des procédés physiques et chimiques et présentant l'aérogel accouplé par insertion entre les couches ; et une résine durcissable mélangée au graphite expansé, et ainsi la présente invention empêche la perte et la séparation de l'aérogel de façon à avoir une isolation thermique améliorée.
PCT/KR2018/005168 2018-05-03 2018-05-04 Isolation souple à base d'aérogel et procédé pour sa fabrication WO2019212080A1 (fr)

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KR1020180051411A KR20190127171A (ko) 2018-05-03 2018-05-03 에어로겔 기반의 유연 단열재 및 제조 방법

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Cited By (2)

* Cited by examiner, † Cited by third party
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CN115286347A (zh) * 2022-08-15 2022-11-04 威赫炘源纳米科技(苏州)有限公司 一种纳米气凝胶隔热材料的制备方法
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